In Patient 2, we observed one example of mild disease with corresponding radiograph findings and viral loads. This may represent many real-world mild cases who may present to medical facility late in their disease course. Therefore, this patient's information has also some important implications. First, even in a patient with mild disease (sore throat only), visible infiltration on CXR was observed at the end of second week. Second, even in a patient with mild disease, if visible infiltration on CXR is observed, virus is still detected in both URT and LRT specimens even at the end of second week after symptom onset. Viral loads of URT were similar with and sometimes higher than LRT specimens, and virus was detectable for longer period in URT specimen. This could be also probably because the patient did not have significant cough and had little amount of spontaneous sputum insufficient for testing.